Definition

A drug used with other drugs to treat adults and children with acute lymphoblastic leukemia. It is used in patients whose cancer has not already been treated or who cannot be treated with asparaginase. It is also being studied in the treatment of other types of cancer. Oncaspar is made up of the enzyme L-asparaginase that is linked to a substance called PEG, which makes the drug stay in the body longer. L-asparaginase comes from the bacterium E. coli and breaks down the amino acid asparagine. This may stop the growth of cancer cells that need asparagine to grow. Oncaspar is a type of protein synthesis inhibitor. Also called PEG-asparaginase and pegaspargase.